1. Department of Diagnostic Radiology, Kaohsiung Chang Gung Memorial Hospital, and the College of Medicine, Chang Gung University, Kaohsiung, Taiwan
2. Institute of Medical Science and Technology, National Sun Yat-sen University, Kaohsiung, Taiwan
3. Department of Neurology, Kaohsiung Chang Gung Memorial Hospital, and the College of Medicine, Chang Gung University, Kaohsiung, Taiwan
4. Institute of Medical Science and Technology and the Department of Electrical Engineering, National Sun Yat-sen University, Kaohsiung, Taiwan